/*
 * Copyright 1999-2017 Alibaba Group Holding Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package studio.raptor.sqlparser.ast;

import studio.raptor.sqlparser.visitor.SQLASTVisitor;

/**
 * Created by wenshao on 16/9/25.
 */
public class SQLLimit extends SQLObjectImpl {

  private SQLExpr rowCount;
  private SQLExpr offset;

  public SQLLimit() {

  }

  public SQLLimit(SQLExpr rowCount) {
    this.setRowCount(rowCount);
  }

  public SQLExpr getRowCount() {
    return rowCount;
  }

  public void setRowCount(SQLExpr rowCount) {
    if (rowCount != null) {
      rowCount.setParent(this);
    }
    this.rowCount = rowCount;
  }

  public SQLExpr getOffset() {
    return offset;
  }

  public void setOffset(SQLExpr offset) {
    if (offset != null) {
      offset.setParent(this);
    }
    this.offset = offset;
  }

  @Override
  protected void accept0(SQLASTVisitor visitor) {
    if (visitor.visit(this)) {
      acceptChild(visitor, offset);
      acceptChild(visitor, rowCount);
    }
    visitor.endVisit(this);
  }

}
